ozone: Add an opaque fb to ScanoutBuffer for primary planes.

ui/ozone/platform/drm/gpu/drm_overlay_validator.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/ozone/platform/drm/gpu/drm_overlay_validator.h"
 
 #include <drm_fourcc.h>
 
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/ozone/platform/drm/common/drm_util.h"
@@ skipping 113 matching lines @@
   for (const auto& plane : last_used_planes)
     reusable_buffers.push_back(plane.buffer);
 
   for (auto& overlay : validated_params) {
     if (!overlay.is_overlay_candidate)
       continue;
 
     gfx::Size scaled_buffer_size = GetScaledSize(
         overlay.buffer_size, overlay.display_rect, overlay.crop_rect);
 
-    uint32_t original_format = GetFourCCFormatForFramebuffer(overlay.format);
+    uint32_t original_format =
+        overlay.plane_z_order
+            ? GetFourCCFormatFromBufferFormat(overlay.format)
+            : GetFourCCFormatForOpaqueFramebuffer(overlay.format);
     scoped_refptr<ScanoutBuffer> buffer =
         GetBufferForPageFlipTest(drm, overlay.buffer_size, original_format,
                                  buffer_generator_, &reusable_buffers);
 
     OverlayPlane plane(buffer, overlay.plane_z_order, overlay.transform,
                        overlay.display_rect, overlay.crop_rect);
     test_list.push_back(plane);
 
     if (buffer && controller->TestPageFlip(test_list)) {
       overlay.is_overlay_candidate = true;
@@ skipping 116 matching lines @@
 
     // Make sure we dont hold reference to buffer when caching this plane list.
     plane.buffer = nullptr;
   }
 
   DCHECK(hints_plane_list.size() == overlay_hints.size());
   overlay_hints_cache_.Put(hints_plane_list, overlay_hints);
 }
 
 }  // namespace ui